Cited by 280Neutrophil, Myeloperoxidase and Oxidative MechanismsRedox biology and oxidative stressNitric Oxide and Endothelin Effects

Proteins Homologous to p47 and p67 Support Superoxide Production by NAD(P)H Oxidase 1 in Colon Epithelial Cells

Open access
Geiszt, Miklós, Lekstrom, Kristen, Witta, Jassir, Leto, Thomas L.·2003·Journal of Biological Chemistry

Abstract

Superoxide production by phagocytes involves activation of a multi-component NADPH oxidase. Recently, several homologues of the catalytic component of the phagocyte oxidase, gp91phox, were identified in various tissues. Here we describe two proteins, p41 and p51, with significant homology to two cytosolic components of the phagocytic oxidase, p47phox and p67phox. Like p47phox, p41 contains an amino-terminal Phox homology domain, two SH3 domains, and a conserved carboxyl-terminal, proline-rich motif. Similarly, p51 is homologous to p67phox, containing four amino-terminal tetratrico-peptide repeats, a conserved "activation domain" motif, a PB1 domain, and a carboxyl-terminal SH3 domain. The highest levels of p41 transcript are detected in the colon and in other gastrointestinal tissues that express Nox1, the predominant gp91phox homologue in these tissues. In contrast, the p51 transcript showed a more widespread expression pattern, suggesting that it may support other tissue-specific oxidases. Mouse colon in situ hybridization detected both transcripts in the epithelial cells of colon crypts. Heterologous co-expression of p41 and p51 significantly enhances the superoxide-generating activity of Nox1-expressing cells; thus, p41 and p51 appear to be novel regulators of Nox1. These proteins also support the activity of gp91phox, albeit at much lower levels than the cytosolic phox counterparts. Our results suggest colon epithelial cells contain a multi-component NAD(P)H oxidase with a molecular architecture similar to the phagocytic oxidase.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1074/jbc.m301289200

Cites

28 of 28 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 4

  1. Geiszt, M., Kopp, J. B., Varnai, P., and Leto, T. L. (2000) Proc. Natl. Acad. Sci.
  2. Leto, T. L., Adams, A. G., and de Mendez, I. (1994) Proc. Natl. Acad. Sci.
  3. Sumimoto, H., Kage, Y., Nunoi, H., Sasaki, H., Nose, T., Fukumaki, Y., Ohno, M., Minakami, S., and Takeshige, K. (1994) Proc. Natl. Acad. Sci. U. S. A. 91, 5345-5349
  4. Arnold, R. S., Shi, J., Murad, E., Whalen, A. M., Sun, C. Q., Polavarapu, R., Parthasarathy, S., Petros, J. A., and Lambeth, J. D. (2001) Proc. Natl. Acad. Sci. U. S. A. 98, 5550 -5555

Cited by

Sorted by citations

Authors
Geiszt, M., Lekstrom, K., Witta, J., & Leto, T. L.
Affiliations
  • Semmelweis University (HU)
  • National Institutes of Health (US)
  • Uniformed Services University of the Health Sciences (US)
Corresponding author
Leto, Thomas L.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2003-05
Volume
278
Issue
22
Pages
20006-20012
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2022385815
Cited by
280
References
28
Citations by year
2026: 1 · 2025: 4 · 2024: 3 · 2023: 5 · 2022: 7 · 2021: 2 · 2020: 5 · 2019: 10 · 2018: 5 · 2017: 5 · 2016: 3 · 2015: 4 · 2014: 11 · 2013: 10 · 2012: 15
FWCI
10.24
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Neutrophil, Myeloperoxidase and Oxidative Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
Keywords
NOX1, p41, p47phox, p67phox, superoxide production, colonic epithelial cells, gp91phox, phox homology domain, SH3 domain, PB1 domain, colonic crypts, gastrointestinal tissue
MeSH terms
Amino Acid Sequence, Animals, Colon, DNA-Binding Proteins, Epithelial Cells, Molecular Sequence Data, Phosphoproteins, RNA, Messenger, Superoxides, Transcription Factors, Trans-Activators, Genes, Tumor Suppressor, Sequence Homology, Amino Acid, In Situ Hybridization, NADPH Oxidases, Tumor Suppressor Proteins, Mice

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review